<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>评论回车发布</title>
    <style>
        .wrapper {
            min-width: 400px;
            max-width: 800px;
            display: flex;
            justify-content: flex-end;
        }

        .avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            overflow: hidden;
            background: url(./images/avatar.jpg) no-repeat center / cover;
            margin-right: 20px;
        }

        .wrapper textarea {
            outline: none;
            border-color: transparent;
            resize: none;
            background: #f5f5f5;
            border-radius: 4px;
            flex: 1;
            padding: 10px;
            transition: all 0.5s;
            height: 30px;
        }

        .wrapper textarea:focus {
            border-color: #e4e4e4;
            background: #fff;
            height: 50px;
        }

        .wrapper button {
            background: #00aeec;
            color: #fff;
            border: none;
            border-radius: 4px;
            margin-left: 10px;
            width: 70px;
            cursor: pointer;
        }

        .wrapper .total {
            margin-right: 80px;
            color: #999;
            margin-top: 5px;
            opacity: 0;
            transition: all 0.5s;
        }

        .list {
            min-width: 400px;
            max-width: 800px;
            display: flex;
        }

        .list .item {
            width: 100%;
            display: flex;
        }

        .list .item .info {
            flex: 1;
            border-bottom: 1px dashed #e4e4e4;
            padding-bottom: 10px;
        }

        .list .item p {
            margin: 0;
        }

        .list .item .name {
            color: #FB7299;
            font-size: 14px;
            font-weight: bold;
        }

        .list .item .text {
            color: #333;
            padding: 10px 0;
        }

        .list .item .time {
            color: #999;
            font-size: 12px;
        }
    </style>
</head>

<body>
<div class="wrapper">
    <i class="avatar"></i>
    <textarea id="tx" placeholder="发一条友善的评论" rows="2" maxlength="200"></textarea>
    <button>发布</button>
</div>
<div class="wrapper">
    <span class="total">0/200字</span>
</div>
<div class="list">
    <div class="item" style="display: none;">
        <i class="avatar"></i>
        <div class="info">
            <p class="name">清风徐来</p>
            <p class="text">大家都辛苦啦，感谢各位大大的努力，能圆满完成真是太好了[笑哭][支持]</p>
            <p class="time">2023-4-10 20:29:21</p>
        </div>
    </div>
</div>
<script>
    //获得输入框的id
    const input = document.querySelector("#tx");
    //获得统计字数的id
    const total = document.querySelector(".total");
    //添加获得焦点的监听事件
    input.addEventListener("focus", function () {
        total.style.opacity = 1;
    })
    //添加失去焦点的监听事件
    input.addEventListener("blur", function () {
        total.style.opacity = 0;
    })
    //统计评论的字数并且赋值到total框中 输入事件
    input.addEventListener('input',function (){
        total.innerHTML=`${input.value.length}/200字`;
    })


</script>
</body>

</html>